anonymous
  • anonymous
Solve the following system of equations and show all work. y = −x^2 + 4 y = 2x + 1
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
i know how to solve a normal system of equations but the squared x is confusing me
Haseeb96
  • Haseeb96
consider equation 1 as eq#1 and equation 2 a eq#2 y= -x^2+4 .............eq#1 y=2x+1...................eq#2 now just pput this eq#2 into eq#1 at the place of y
anonymous
  • anonymous
2x+1=x^2+4

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Haseeb96
  • Haseeb96
no 2x+1 = -x^2+4 x^2+2x-3 =0 now factorize this equation and tell me what you get the value of x ?
Haseeb96
  • Haseeb96
do you know how to do factorization?
anonymous
  • anonymous
oohh yes of course you'd get x=-3,1
anonymous
  • anonymous
thx lots
Haseeb96
  • Haseeb96
sorry i was wrong @gold.shosho you were correct now plug this x values one by one in eq#2 and get the values of y
nincompoop
  • nincompoop
so how is the x^2 confusing?
nincompoop
  • nincompoop
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anonymous
  • anonymous
you're right @nincompoop it just means a parabola

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